Property, Plant and Equipment - Summary of Property, Plant and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 373,287us-gaap_PropertyPlantAndEquipmentGross	$ 329,876us-gaap_PropertyPlantAndEquipmentGross	$ 247,279us-gaap_PropertyPlantAndEquipmentGross
Less: accumulated depreciation	(136,397)	(109,635)	(78,130)
Accumulated depreciation on equipment under capital lease			(2,414)
Land	17,407us-gaap_Land	17,151us-gaap_Land	15,928us-gaap_Land
Property, plant and equipment, net	254,297us-gaap_PropertyPlantAndEquipmentNet	237,392us-gaap_PropertyPlantAndEquipmentNet	182,663us-gaap_PropertyPlantAndEquipmentNet
Buildings and related structures [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	81,050	79,658	73,021
Machinery and equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	269,840	232,888	151,100
Vehicles and others [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	22,397	17,330	11,998
Equipment under capital lease [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross			$ 11,160

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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-Name Accounting Standards Codification

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The total charge for the use of long-lived depreciable assets subject to a lease meeting the criteria for capitalization.

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Amount before accumulated depletion of real estate held for productive use, excluding land held for sale.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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